JP2019191839A - Collision avoidance device - Google Patents

Abstract

To provide a collision avoidance device suppressing unnecessary braking while avoiding collision.SOLUTION: In an own vehicle 100, a collision avoidance device (10) comprises: a receiving part (16) receiving at least information on a position of a mobile object moving on a road crossing a road on which an own vehicle travels; a camera (14) for photographing a traveling direction of the own vehicle; a speed meter (11); a braking device (12); and a collision avoidance control part (20). The collision avoidance control part calculates a moving locus of the mobile object from transition of a position of the mobile object received by the receiving part, calculates a moving locus of the own vehicle using speed of the own vehicle acquired by the speed meter, and determines whether there is possibility that the mobile object collides with the own vehicle using the moving locus of the mobile object and that of the own vehicle. When the mobile body is likely to collide with the own vehicle and is shielded and cannot be recognized by the camera, the collision avoidance control part calculates a risk index for determining possibility of collision, and adopts means avoiding collision according to the risk index.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a collision avoidance device.

  In recent years, various technologies have been developed for the purpose of avoiding a collision of a moving body such as a vehicle. In Patent Document 1, using sensor information transmitted from sensors installed on a road, the presence or absence of a collision is predicted by a probabilistic method, and from the relationship between predicted arrival times of vehicles coming from different directions, It is disclosed that the possibility of occurrence of a collision accident between vehicles is determined in advance and an alarm is given to a driver as necessary, or the vehicle is directly controlled to decelerate or stop the vehicle. Cited Document 2 describes a case where the host vehicle is an emergency vehicle.

JP 2002-140799 A JP 2010-191604 A

  However, if the target vehicle for which the possibility of a collision has been judged is in a position shielded by a building or the like and cannot be seen, it is unnecessary operation if the own vehicle is restricted only by information obtained through communication, etc. There was a risk of becoming. The control of the host vehicle in a situation where the target vehicle is not visible may be unexpected for the passengers and subsequent vehicles of the vehicle. However, in order to avoid a collision or the like, control such as sudden braking may be necessary even if it is not expected.

  The present invention has been made in view of the above-described problems, and can be realized as the following forms.

  According to one aspect of the present invention, a collision avoidance device (10) is provided. The collision avoidance apparatus includes a receiving unit (16) that receives information on at least a position of a moving body that moves on a road that intersects a road on which the host vehicle runs, a camera (14) that captures a traveling direction of the host vehicle, A speedometer (11), a braking device (12), and a collision avoidance control unit (20), wherein the collision avoidance control unit is configured to detect the moving object based on a transition of the position of the moving object received by the receiving unit. The movement locus of the own vehicle is calculated using the speed of the own vehicle acquired by the speedometer, and the movement locus of the moving body and the movement locus of the own vehicle are used. It is determined whether or not the moving locus of the moving body is a locus that may collide with the own vehicle, the moving locus of the moving body is a locus that may collide with the own vehicle, and The moving body is shielded and cannot be recognized by the camera If, to calculate the risk index for determining the means of collision avoidance, which employs the collision avoidance in accordance with the risk indicators.

  According to this aspect, when the moving track of the moving object is a track that may collide with the host vehicle and the moving object exists at a position that cannot be recognized by the camera due to the shielding object, the collision avoidance control unit Then, a risk index for determining the possibility of collision is calculated, and a collision avoidance means corresponding to the risk index is adopted. That is, the collision avoidance control unit applies sudden braking when the risk index is high and the possibility of collision is high, and applies gentle braking when the risk index is low and the possibility of collision is low. , Avoid collision according to the risk index. As a result, when the possibility of a collision is low, sudden braking is applied, and the possibility of being unexpected for the vehicle occupant and the following vehicle can be reduced.

  The present invention can be realized in various forms, for example, by a collision avoidance method in addition to the collision avoidance device.

It is explanatory drawing which shows schematic structure of the own vehicle provided with a collision avoidance apparatus. It is an example of the situation where collision avoidance control is performed. 3 is a control flowchart of collision avoidance executed by the collision avoidance control unit after the moving body recognition unit of the collision avoidance control unit recognizes the vehicle from the communication result in the transmission / reception unit in the situation shown in FIG. It is a calculation flowchart of the risk index which a risk index calculation part performs. It is a calculation flowchart of the risk index which a risk index calculation part performs. It is explanatory drawing which shows schematic structure of the collision avoidance apparatus 10 of a modification.

-Embodiment:
FIG. 1 is an explanatory diagram illustrating a schematic configuration of a collision avoidance device 10 included in the host vehicle 100. The collision avoidance device 10 includes a speedometer 11, a braking device 12, a camera 14, a radar 15, a transmission / reception unit 16, a microphone 17, a steering device 18, and a CPU 19.

  The speedometer 11 is a device that acquires the speed of the host vehicle 100. The braking device 12 is a device that decelerates or stops the host vehicle 100. The braking device 12 is a braking device that uses frictional force, and is used when applying strong braking or loose braking. The braking device 12 includes an antilock brake system. The braking device 12 includes a case where an electric motor is used as a regenerative braking device in addition to the braking device 12 that performs braking by friction. The steering device 18 is a device that changes the direction of the host vehicle 100.

  The camera 14 photographs the front of the host vehicle 100. In the present embodiment, a monocular camera or a binocular camera can be used as the camera 14. The camera 14 may be a monochrome camera or a color camera. The camera 14 may be a camera including a wide angle lens or a zoom lens. A wide angle may be covered with a plurality of cameras. Further, a rotation device that changes the shooting direction of the camera 14 may be provided.

  The radar 15 emits an electromagnetic wave or a laser in front of the host vehicle 100, receives the reflected wave, and detects the state in front of the host vehicle 100. As the radar 15, for example, a millimeter wave radar that uses millimeter waves, an infrared radar that uses infrared rays, and a LiDAR (Light Detection and Ranging) radar that uses light having a shorter wavelength than infrared rays can be used. The radar 15 may be configured to include a plurality of radars.

  The transmission / reception unit 16 is a communication device used for communication (V2X) between the host vehicle 100 and another communication device that is not mounted on the host vehicle 100. In this communication, for example, the communication destination is V2N (Vehicle-to-cellular-Network) which is a communication network through a base station of a mobile phone or a smartphone, and the communication destination is V2V which is a communication device mounted on another vehicle. (Vehicle-to-Vehicle), V2I (Vehicle-to-roadside-Infrastructure), which is a communication device installed on the road, and a smartphone owned by a pedestrian or a person driving a bicycle V2P (Vehicle-to-Pedestrian) is included. V2X is a generic expression of these V2N, V2V, V2I, and V2P. The transmission / reception unit 16 is configured such that the transmission / reception unit 16 functions as a reception unit that obtains information from other communication devices through V2X, and a transmission unit that transmits information of the host vehicle 100 to other communication devices through V2X. It is because it has the function as. In addition, the structure provided with the receiving part provided only with a receiving function instead of the transmission / reception part 16 may be sufficient. The transmission / reception unit 16 may include a reception unit of a road traffic information communication system (Vehicle Information and Communication System (VICS (registered trademark))). Using the VICS, the transmission / reception unit 16 can acquire road congestion information, traffic volume, and whether the road is a priority road.

  The microphone 17 acquires a running sound of a vehicle outside the host vehicle 100. In addition, it is preferable that the microphone 17 has directivity so that the traveling sound of the vehicle ahead of the host vehicle 100 can be acquired. Moreover, you may provide the filter which can acquire only a driving | running | working sound.

  The CPU 19 includes a collision avoidance control unit 20. The collision avoidance control unit 20 is a control device that controls the host vehicle 100 to avoid a collision with another object. The collision avoidance control unit 20 includes a moving body recognition unit 21, an image analysis unit 22, an ambient situation recognition unit 23, a trajectory determination unit 24, a risk index calculation unit 25, a braking control unit 26, and a steering control unit 27. And comprising. These collision avoidance control unit 20 and the moving body recognition unit 21 which is a component thereof, an image analysis unit 22, an ambient situation recognition unit 23, a trajectory determination unit 24, a risk index calculation unit 25, and a braking control unit 26 And the steering control part 27 is comprised by the computer program, for example, and these functions are implement | achieved when CPU19 runs a computer program. In addition, you may comprise the collision avoidance control part 20 with a hardware.

  The mobile object recognition unit 21 receives at least information on the position of the mobile object by the transmission / reception unit 16, recognizes the presence of the mobile object having the V2X communication device, and recognizes the position and speed of the mobile object. The moving body recognition unit 21 can acquire the speed of the moving body from the transition of the position of the moving body. Here, the moving body means other vehicles, pedestrians, bicycles and the like. When the mobile body is a pedestrian or a bicycle, the V2X communication device is, for example, a smartphone possessed by a pedestrian or a bicycle driver. Even if the moving body is another vehicle, if the other vehicle does not have a V2X communication device, the V2X communication device may be a smartphone carried by a driver or a passenger. .

  The image analysis unit 22 analyzes the image captured by the camera 14 and determines whether a moving body exists in the image. In addition, the image captured by the camera 14 is analyzed, and it is determined whether or not there is an object that shields and hides the moving object, for example, a wall, in the image. In addition, it is determined whether a traffic sign or a road sign is present in the image, and if there is a traffic sign or a road sign, the traffic sign or road sign is recognized.

  The surrounding situation recognition unit 23 uses, for example, information on a moving body recognized by the moving body recognition unit 21, information on a moving body and traffic signs recognized using the camera 14, and information on a moving body recognized using the radar 16. Thus, the situation around the host vehicle 100 is recognized.

  The trajectory determination unit 24 estimates the future movement trajectory of the moving object using the position and speed of the moving object. Further, the trajectory determination unit 24 estimates the future movement trajectory of the host vehicle 100 using the speed of the host vehicle 100. Then, it is determined whether or not there is a possibility that the moving body collides with the host vehicle 100.

  The risk index calculation unit 25 uses the information on the moving body acquired from the moving body recognition unit 21, the analysis result of the image captured by the camera 14, and the situation of the own vehicle 100 recognized by the surrounding situation recognition unit 23. Calculates a risk index for determining the possibility of collision with the moving object. The calculation of the risk index will be described later.

  The braking control unit 26 controls the braking device 12 according to the value of the risk index. For example, the braking control unit 26 instructs the braking device 12 to perform strong braking when the risk index is high, and to instruct weak braking when the risk index is low. The steering control unit 27 changes the direction of the host vehicle 100 when the braking control unit 26 instructs weak braking.

  FIG. 2 is an example of a situation in which collision avoidance control is performed. The situation shown in FIG. 2 is as follows. The host vehicle 100 is traveling on the road 300. There is a road 310 that intersects the road 300 in front of the traveling direction of the host vehicle 100, and other vehicles 200, 201, and 202 that are moving bodies are traveling (moving) on the road 310. The other vehicles 201 and 202 are passing through the intersection with the road 300 or have already passed, and do not collide with the host vehicle 100. The other vehicle 200 does not pass through the intersection with the road 300. The presence of the vehicle 200 is recognized by the moving body recognition unit 21 (FIG. 1) of the host vehicle 100, but is shielded by the wall 320 and is in a position that cannot be recognized by the camera 14 or the radar 16. A traffic light 330 exists behind the other vehicle 200.

  FIG. 3 shows the collision avoidance control executed by the collision avoidance control unit 20 after the moving body recognition unit 21 of the collision avoidance control unit 20 recognizes the vehicle 200 from the communication result in the V2X transmission / reception unit 16 in the situation shown in FIG. It is a flowchart. In step S100, the collision avoidance control unit 20 determines whether or not the moving body recognition unit 21 has recognized the vehicle 200 from the information received by the V2X transmission / reception unit 16. If the vehicle 200 is recognized, the process proceeds to step S110. If the vehicle 200 is not recognized, the process is terminated.

  In step S <b> 110, the trajectory determination unit 24 of the collision avoidance control unit 20 estimates the future movement trajectory of the vehicle 200 using, for example, the position transition of the vehicle 200 received by the transmission / reception unit 16.

  In step S <b> 120, the trajectory determination unit 24 acquires the speed of the host vehicle 100 from the speedometer 11 and calculates a future movement trajectory of the host vehicle 100.

  In step S <b> 130, the trajectory determination unit 24 may use the estimated future travel trajectory of the vehicle 200 and the calculated future travel trajectory of the own vehicle 100 to cause the travel trajectory of the vehicle 200 to collide with the own vehicle 100. It is determined whether or not there is a gauge. Here, the locus having the possibility of collision includes not only the case where the host vehicle 100 and the vehicle 200 travel as they are, but also the case where the possibility of collision is high. When the movement locus of the vehicle 200 is a locus that may collide with the host vehicle 100, the process proceeds to step S140. If the movement locus of the vehicle 200 is not a locus that may collide with the host vehicle 100, the processing is terminated.

  In step S140, the image analysis unit 22 of the collision avoidance control unit 20 causes the camera 14 to photograph the front of the host vehicle 100. In step S150, the image analysis unit 22 determines whether or not the vehicle 200 is shielded by a shield. For example, the image analysis unit 22 recognizes the position where the vehicle 200 in the image is captured from the current position of the host vehicle 100 and the current position of the vehicle 200. When there is a shielding object such as a wall at the position and the vehicle 200 cannot be recognized, it is determined that the vehicle 200 is shielded by the shielding object. When the vehicle 200 is blocked by a wall or the like and cannot be recognized, the collision avoidance control unit 20 proceeds to step S160, and the vehicle 200 is not blocked by the wall or the like and can recognize the vehicle 200 on the image. In step S190, the process proceeds to step S190.

  In step S190, the braking control unit 26 of the collision avoidance control unit 20 instructs the braking device 12 to perform strong braking. When the vehicle 200 is not shielded by a wall or the like and the vehicle 200 can be recognized on the image, it is considered that the vehicle following the host vehicle 100 also recognizes the vehicle 200. For this reason, even if strong braking is performed, there is a low possibility of a rear-end collision from a subsequent vehicle. Here, the strong braking is, for example, braking with strength just before the anti-lock brake of the braking device 12 is activated. This is because the braking force is strongest immediately before the antilock brake is activated. However, if the movement trajectory of the host vehicle 100 at the time of braking is calculated and it is confirmed that the host vehicle 100 and the vehicle 200 do not collide using the movement trajectory and the movement trajectory of the vehicle 200, the braking control is performed. The unit 26 may control the braking device 12 with a braking force that can avoid a collision.

  In step S160, the risk index calculation unit 25 of the collision avoidance control unit 20 calculates a risk index. The calculation of the risk index executed by the risk index calculation unit 25 will be described later.

  In step S170, the braking control unit 26 of the collision avoidance control unit 20 determines whether or not the risk index is greater than or equal to a predetermined threshold value. If the risk index is equal to or greater than the threshold, the process proceeds to step S190, and the above-described strong braking is instructed to the braking device 12. On the other hand, if the risk index is less than the threshold, the process proceeds to step S180. In step S180, the braking control unit 26 instructs the braking device 12 to perform gentle braking, and avoids a collision from the following vehicle. Here, loose braking means braking with a braking force smaller than the braking force with which the anti-lock brake operates. The braking force in loose braking may be, for example, about 20% of the braking force when the antilock brake is activated.

  4 and 5 are flowcharts of risk index calculation executed by the risk index calculation unit 25. FIG. In step S200, the value of the risk index is set to a. This risk index value a is a risk index value given when the vehicle 200 existing on a trajectory that may collide is recognized, and the vehicle 200 is blocked by a shield and cannot be recognized by the camera 14.

  In step S210, the risk index calculation unit 25 determines whether or not the traffic volume of the road 310 that intersects the road 300 on which the host vehicle 100 travels is equal to or greater than a threshold value. If the traffic volume is equal to or greater than the threshold value, the process proceeds to step S220. Then, b is added to the value of the risk index to increase the risk index. Thereafter, the process proceeds to step S230. On the other hand, if the traffic volume is less than the threshold value, the process proceeds to step S230 without executing step S220. For example, the risk index calculation unit 25 acquires the number of vehicles 200 traveling on the road 310 during a predetermined time period, the number of vehicles 201 and 202 that are other moving bodies, and the like from the communication result in the transmission / reception unit 16, and the road 310 Determine the traffic volume. The risk index calculation unit 25 may receive the road traffic information of the road 310 from the road traffic information communication system (VICS) using the transmission / reception unit 16 and determine the traffic volume of the road 310. The risk index calculation unit 25 may cause the image analysis unit 22 to analyze an image captured by the camera 14 to obtain the number of vehicles traveling on the road 310 during a predetermined time, and determine the traffic volume on the road 310. . Further, the risk index calculation unit 25 may determine the number of vehicles traveling on the road 310 during a predetermined time using the radar 15 and determine the traffic volume on the road 310.

  In step S230, when the road 310 is a priority road, the risk index calculation unit 25 proceeds to step S240 and adds c to the value of the risk index to increase the risk index. Thereafter, the process proceeds to step S250. On the other hand, if the road 310 is not a priority road, the process proceeds to step S250 without executing step S240. For example, the risk index calculation unit 25 causes the image analysis unit 22 to analyze an image captured by the camera 14 and recognizes an instruction sign indicating “priority road ahead” and determines that the road 310 is a priority road. May be. The risk index calculation unit 25 may determine whether the road 310 is a priority road using information acquired from the road traffic information communication system (VICS) using the transmission / reception unit 16.

  In step S250, the risk index calculation unit 25 causes the image analysis unit 22 to analyze the image captured by the camera 14, and when, for example, a restriction sign indicating “pause” is recognized, the process proceeds to step S260 and the risk index is calculated. The risk index is increased by adding d to the value of. Thereafter, the process proceeds to step S270. This is because the intersecting road 310 can be determined to have a higher priority. On the other hand, when the restriction sign indicating “pause” is not recognized, the process proceeds to step S270 without executing step S260. The risk index calculation unit 25 causes the image analysis unit 22 to analyze the image captured by the camera 14 and results in the image captured by the camera 14 being imaged even when the regulation sign indicating “pause” cannot be recognized. As a result of the analysis performed by the analysis unit 22, when a “stop” road sign is recognized on the road 300, the process proceeds to step S 260, d is added to the value of the risk index to increase the risk index, and then You may transfer to step S270. This is because a restriction sign indicating “pause” may not be visible in an image captured by the camera 14 while hidden behind a tree, for example. Further, the risk index calculation unit 25 may increase the risk index even when the road marking of the pedestrian crossing is recognized on the road 300. As described above, the risk index calculation unit 25 can acquire the priority of the road using the information on the sign or the road sign obtained by analyzing the image captured by the camera, and can increase the risk index.

  In step S270, the risk index calculation unit 25 acquires the timing at which the position of the traffic light 330 on the road 310 and the lighting of the traffic light 330 change using the transmission / reception unit 16, and further considers the movement locus of the vehicle 200 The possibility of reaching the track where the vehicle 100 and the vehicle 200 collide is determined. When the risk index calculation unit 25 determines that there is a possibility that the vehicle 100 and the vehicle 200 may collide with each other, the risk index calculation unit 25 proceeds to step S280 and adds e to the risk index value. To increase. Thereafter, the process proceeds to step S290. On the other hand, when it is determined that there is no possibility that the vehicle 100 and the vehicle 200 collide with each other, the process proceeds to step S290 without executing step S280.

  In step S290, the risk index calculation unit 25 causes the image analysis unit 22 to analyze the image captured by the camera 14, and when the light of the headlight of the vehicle 200 traveling on the road 310 is recognized, the process proceeds to step S300. The risk index is increased by adding f to the risk index value. Thereafter, the process proceeds to step S310. On the other hand, when the light of the headlight of the vehicle 200 traveling on the road 310 is not recognized, the process proceeds to step S310 without executing step S300. In particular, at night, even if the vehicle 200 is shielded by the wall 320 or the like, the vehicle 200 can be recognized from the light of the headlight. A sensor that detects the amount of light in front of the camera 14 may be provided, and the light of the headlight may be detected by this sensor.

  In step S310, the risk index calculation unit 25 analyzes the sound acquired by the microphone 17, and when the traveling sound of the vehicle 200 traveling on the road 310 is included, the process proceeds to step S320 and the value of the risk index. To increase the risk index. Thereafter, the process proceeds to step S170 in FIG. On the other hand, when the traveling sound of the vehicle 200 traveling on the road 310 cannot be recognized, the process proceeds to step S170 in FIG. 3 without executing step S320.

  As described above, according to the present embodiment, the collision avoidance control unit 20 determines whether or not the risk index is greater than or equal to a predetermined threshold value. Thus, when a strong braking is instructed and the risk index is less than the threshold, a collision avoidance means corresponding to the risk index is employed so as to instruct the braking device 12 to perform a gentle braking. As a result, when the risk index is low, sudden braking can be applied to reduce the risk that the passenger or the following vehicle will become unexpected or will collide with the following vehicle.

  In step S110 and step S120 of FIG. 3, the trajectory determination unit 24 may estimate a future movement trajectory of the vehicle 200 using, for example, the position of the vehicle 200 acquired by the reception unit 16. In addition, the trajectory determination unit 24 acquires the position of the host vehicle 100 acquired by the receiving unit 16, or analyzes the image of the camera 14 to acquire the position of the host vehicle 100 and calculates the movement track of the host vehicle 100. May be. The trajectory determination unit 24 can acquire the positions and movement trajectories of the host vehicle 100 and the vehicle 200 in this way.

  In the present embodiment, when calculating the risk index, the risk index calculation unit 25 determines the traffic volume of the intersecting road 310 (step S210 in FIG. 4), the intersecting road 310 is the priority road (step S230), and is temporarily stopped. Since the judgment of the sign (step S250), the possibility of collision from the signal information (step S270), the headlight of the other vehicle (step S290), and the traveling sound of the other vehicle (step S310) are performed, the risk index is more detailed. It can be calculated. The risk index calculation unit 25 does not need to make all of these determinations, and may employ only arbitrary determinations. Further, the risk index calculation unit 25 may increase the risk index in cases other than those described above. For example, the risk index may be increased when it is determined from the sound of the microphone or the information acquired by the transmission / reception unit 16 that the emergency vehicle is traveling on the intersecting road 310.

  In the description of FIG. 3, in step S <b> 100, when the moving body recognizing unit 21 does not recognize the vehicle 200 by the V2X transmission / reception unit 16, the process is ended. However, even if the moving body recognition unit 21 does not recognize the vehicle 200 by the V2X transmission / reception unit 16, there is a possibility that the collision avoidance control unit 20 may collide with the host vehicle 100 by the camera 14 or the radar 15. When a certain moving body is recognized, braking is commanded to the braking device 12, and collision avoidance is executed.

  In the description of FIG. 3, the braking control unit 26 performs two controls of strong braking and weak braking depending on whether the risk index is greater than or less than a threshold value, but the braking strength may be controlled more finely. . The braking control unit 26 may continuously change the strength of braking, for example, according to the value of the risk index.

  In the above embodiment, the collision avoidance with the vehicle 200 traveling on the road 310 as the moving body has been described as an example. However, even if the moving body is a person other than the vehicle 200 or a bicycle, the collision described in the above embodiment. Avoidance is applicable. That is, when a person or a bicycle driver possesses a smartphone, the transmission / reception unit 16 can communicate with these smartphones by V2P, recognize a person or a bicycle hidden in a shield, The collision avoidance described in this embodiment can be executed.

  In this embodiment, the case where the other vehicle 200 is shielded by the wall 320 is taken as an example. However, the shield may be a building other than the wall 320, and other than the building, for example, It may be a case where a tree, a signboard, a parked vehicle, or a large vehicle running on the same road 300 as the host vehicle 100 is shielded. It may be a case where the vehicle 200 cannot be recognized due to backlight, failure of the camera 14, fog, snow, smoke, or the like. Further, the present invention can also be applied when the vehicle 200 comes out of a parking lot or joins from a three-way intersection.

  In the above-described embodiment, as the collision avoidance means, the braking force is increased when the risk index is high, and the braking force is decreased when the risk index is low, but other collision avoidance means can be employed. For example, the other mobile body may be notified of the possibility that the other mobile body may collide with the host vehicle using V2V communication or a horn. In addition, when the road on which the host vehicle 100 travels has multiple lanes and can be avoided from a collision by changing the lane, the host vehicle 100 is braked or the lane change is executed instead of braking the host vehicle 100. You may do it.

  It is preferable to determine appropriate values for the magnitude of a to g and the threshold value to be added by the risk index by experiments or the like.

・ Modification:
FIG. 6 is an explanatory diagram illustrating a schematic configuration of a collision avoidance device 10 according to a modification. The difference from the embodiment is that a navigation device 13 is provided. The navigation device 13 is a device that provides route guidance to the position of the host vehicle 100 and a destination. The navigation device has map data, for example, receives a signal from a satellite of GNSS (Global Navigation Satellite System) and specifies the position of the host vehicle 100. In addition to signals from GNSS satellites, the navigation device 13 receives, for example, radio waves from radio beacons provided on the road, radio waves from portable base stations, and radio waves from Wi-Fi base stations. The position of the vehicle 100 can be specified. Further, the risk index calculation unit 25 uses the map data of the navigation device 13 to obtain the priority order of the road on which the host vehicle 100 travels and the intersecting road 310, and determines whether the intersecting road 310 is a priority road. I can judge. For example, when it is determined from the map data of the navigation device 13 that there is a “pause” restriction sign at the intersection with the road 310, the risk index calculation unit 25 can determine that the intersecting road 310 is a priority road. Thus, the collision avoidance device 10 may include a navigation device. Also in the modified example, the collision avoidance control unit 20 determines whether or not the risk index is equal to or greater than a predetermined threshold. If the risk index is equal to or greater than the threshold, the collision avoidance control unit 20 instructs the braking device 12 to perform strong braking. When the risk index is less than the threshold value, a collision avoidance unit corresponding to the risk index is employed so as to instruct the braking device 12 to perform gentle braking. As a result, when the risk index is low, sudden braking can be applied to reduce the risk that the passenger or the following vehicle will become unexpected or will collide with the following vehicle.

  The present invention is not limited to the above-described embodiment, and can be realized with various configurations without departing from the spirit of the present invention. For example, the technical features of the embodiments corresponding to the technical features in each embodiment described in the summary section of the invention are intended to solve part or all of the above-described problems, or part of the above-described effects. Or, in order to achieve the whole, it is possible to replace or combine as appropriate. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

  The present invention can be realized, for example, as the following forms.

According to one aspect of the present invention, a collision avoidance device (10) is provided. The collision avoidance apparatus includes a receiving unit (16) that receives information on at least a position of a moving body that moves on a road that intersects a road on which the host vehicle runs, a camera (14) that captures a traveling direction of the host vehicle, A speedometer (11), a braking device (12), and a collision avoidance control unit (20), wherein the collision avoidance control unit is configured to detect the moving object based on a transition of the position of the moving object received by the receiving unit. The movement locus of the own vehicle is calculated using the speed of the own vehicle acquired by the speedometer, and the movement locus of the moving body and the movement locus of the own vehicle are used. It is determined whether or not the moving locus of the moving body collides with the own vehicle, and the moving locus of the moving body is a locus that may collide with the own vehicle, and The moving body is shielded and cannot be recognized by the camera. If, to calculate the risk index for determining the means of collision avoidance, which employs the collision avoidance in accordance with the risk indicators. That is, the collision avoidance control unit applies sudden braking when the risk index is high and the possibility of collision is high, and applies gentle braking when the risk index is low and the possibility of collision is low. , Avoid collision according to the risk index. As a result, when the possibility of a collision is low, sudden braking is applied, and the possibility of being unexpected for the vehicle occupant and the following vehicle can be reduced.

  In the above embodiment, the collision avoidance control unit, as the collision avoidance unit, increases the braking force of the braking device when the risk index is greater than or equal to a predetermined threshold value compared to when the risk index is less than the threshold value. Control may be performed. According to this aspect, the control unit applies sudden braking when the risk index is high and the possibility of collision is high, and applies gentle braking when the risk index is low and the possibility of collision is low. The collision avoidance according to the risk index can be performed.

  In the above aspect, the collision avoidance control unit determines the risk index when the traffic volume of the intersecting road is equal to or greater than a predetermined threshold value, compared to when the traffic volume of the intersecting road is less than the threshold value. May be higher. According to this aspect, the collision avoidance control unit can easily avoid a collision by increasing the risk index when the traffic volume of the intersecting road is equal to or greater than a predetermined threshold.

  In the above aspect, the collision avoidance control unit includes the traffic volume of the intersecting road received by the reception unit, and the traffic volume of the intersecting road obtained by analyzing an image captured by the camera. The traffic volume of the intersecting road may be determined using at least one. According to this aspect, the traffic volume of the intersecting road can be easily determined.

  The said form WHEREIN: Furthermore, the radar (15) is provided, The said collision avoidance control part uses the traffic volume of the said intersecting road obtained by analyzing the signal received with the said radar, and the traffic volume of the said intersecting road May be judged. According to this aspect, the traffic volume of the intersecting road can be easily determined.

  In the above embodiment, the collision avoidance control unit obtains the priority order of the road on which the host vehicle runs and the road on which the mobile body moves, and the priority order of the road on which the mobile body moves is a road on which the host vehicle runs. When the priority is higher than the priority, the risk index may be higher than when the priority is low. According to this aspect, when the priority of intersecting roads is high, the host vehicle has an obligation to stop, so the collision avoidance control unit can easily avoid a collision by increasing the risk index.

  The said form WHEREIN: Furthermore, a navigation apparatus (13) is provided, The said collision avoidance control part may acquire the said priority using the said navigation apparatus. According to this aspect, the priority order of the road can be easily acquired.

  In the above aspect, the collision avoidance control unit is configured to calculate the moving object and the vehicle from the information on the traffic signal on the intersecting road received by the receiving unit, the transition of the position of the moving object, and the position and speed of the host vehicle. When it is determined that there is a possibility of reaching a track where the host vehicle collides, the risk is higher than when it is not determined that there is a possibility that the mobile body and the host vehicle will collide. The index may be increased. According to this aspect, the collision avoidance control unit increases the risk index when determining that there is a possibility that the moving body and the host vehicle collide with each other, so that the collision can be easily avoided.

  In the above aspect, when the collision avoidance control unit recognizes the light of the headlight of the moving body in the image as a result of analyzing the image captured by the camera, the light of the headlight of the moving body The risk index may be made higher than when not recognizing. According to this aspect, according to this aspect, the collision avoidance control unit increases the risk index when recognizing the light of the headlight of the moving body, so that it is easy to avoid the collision particularly at night.

  In the above aspect, the apparatus further includes a microphone that acquires a sound of a traveling sound of a vehicle outside the host vehicle, and the collision avoidance control unit includes a traveling sound of the moving body in a traveling sound of the vehicle outside the host vehicle. When it is determined that it is included, the risk index may be set higher than when it is not determined that the traveling sound of the moving body is included in the traveling sound of the vehicle outside the host vehicle. . According to this aspect, the collision avoidance control unit can recognize the presence of the moving object hidden behind the shielding object from the traveling sound of the moving object, and in this case, the risk index is increased, so that it is easy to avoid the collision. it can.

    DESCRIPTION OF SYMBOLS 10 ... Collision avoidance apparatus 11 ... Speedometer 12 ... Braking apparatus 13 ... Navigation apparatus 14 ... Camera 15 ... Radar 16 ... Transmission / reception part 17 ... Microphone 18 ... Steering device 19 ... CPU 20 ... Collision avoidance control part 21 ... Moving body recognition part 22 ... Image analysis unit 23 ... Ambient condition recognition unit 24 ... Track determination unit 25 ... Risk index calculation unit 26 ... Brake control unit 27 ... Steering control unit 100 ... Self vehicle 200 ... Vehicle 201 ... Vehicle 202 ... Vehicle 300 ... Road 310 ... Road 320 ... wall 330 ... signal

Claims (11)

A collision avoidance device (10),
A receiving unit (16) for receiving information on at least a position of a moving body that moves on a road that intersects a road on which the host vehicle runs;
A camera (14) for photographing the traveling direction of the host vehicle;
A speedometer (11),
A braking device (12);
A collision avoidance control unit (20);
With
The collision avoidance control unit
From the transition of the position of the moving body received by the receiving unit, the movement locus of the moving body is calculated,
Using the speed of the host vehicle acquired by the speedometer to calculate the movement trajectory of the host vehicle,
Using the movement trajectory of the moving body and the movement trajectory of the host vehicle, determining whether the movement trajectory of the moving body may collide with the host vehicle or not,
If the moving trajectory of the moving object is a trajectory that may collide with the host vehicle, and the moving object is shielded and cannot be recognized by the camera, a risk index for determining means for avoiding collision is provided. A collision avoidance device that calculates and adopts a collision avoidance means according to the risk index. The collision avoidance device according to claim 1,
The collision avoidance control unit performs control to increase the braking force of the braking device when the risk index is equal to or higher than a predetermined threshold as compared with a case where the risk index is lower than the threshold as the means for avoiding the collision. , Collision avoidance device. The collision avoidance device according to claim 1 or 2,
The collision avoidance control unit increases the risk index when the traffic volume of the intersecting road is greater than or equal to a predetermined threshold value, compared to when the traffic volume of the intersecting road is less than the threshold value, Avoidance device. The collision avoidance device according to claim 3,
The collision avoidance control unit receives at least one of the traffic volume of the intersecting road received by the reception unit and the traffic volume of the intersecting road obtained by analyzing an image captured by the camera. A collision avoidance device that uses and determines the traffic volume of the intersecting road. The collision avoidance device according to claim 3, further comprising:
Equipped with radar (15)
The collision avoidance control unit determines the traffic volume of the intersecting road using the traffic volume of the intersecting road obtained by analyzing the signal received by the radar. The collision avoidance device according to any one of claims 3 to 5,
The collision avoidance control unit obtains the priority of the road on which the host vehicle runs and the road on which the mobile body moves, and the priority on the road on which the mobile body moves is higher than the priority on the road on which the host vehicle runs. The collision avoidance device increases the risk index when the value is higher than when the value is low. The collision avoidance device according to claim 6, further comprising:
A navigation device (13),
The collision avoidance device, wherein the collision avoidance control unit acquires the priority order using the navigation device. The collision avoidance device according to claim 6,
The collision avoidance apparatus, wherein the collision avoidance control unit acquires the priority using information on a sign or a road sign obtained by analyzing an image captured by the camera. The collision avoidance device according to any one of claims 3 to 8,
The collision avoidance control unit determines whether the mobile body and the host vehicle are based on the traffic signal information and the transition of the position of the mobile body received on the intersecting road and the position and speed of the host vehicle. When it is determined that there is a possibility of reaching a collision track, the risk index is increased compared to a case where it is not determined that there is a possibility that the mobile body and the host vehicle will collide. , Collision avoidance device. The collision avoidance device according to any one of claims 3 to 9,
When the collision avoidance control unit recognizes the light of the headlight of the moving body in the image as a result of analyzing the image captured by the camera, the collision avoidance control unit does not recognize the light of the headlight of the moving body Compared to the above, a collision avoidance device that increases the risk index. The collision avoidance device according to any one of claims 3 to 10, further comprising:
A microphone for acquiring the sound of the running sound of the vehicle outside the host vehicle;
When the collision avoidance control unit determines that the traveling sound of the moving body is included in the traveling sound of the vehicle outside the own vehicle, the traveling body is included in the traveling sound of the vehicle outside the own vehicle. A collision avoidance device that raises the risk index as compared with a case where it is not determined that the traveling sound of the vehicle is included.

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